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200 papers

We present a morphological study of galaxies in the A901/902 supercluster from the COMBO-17 survey. A total of 570 galaxies with photometric redshifts in the range 0.155 < z_phot < 0.185 are visually classified by three independent…

Astrophysics · Physics 2009-06-23 K. P. Lane , M. E. Gray , A. Aragon-Salamanca , C. Wolf , K. Meisenheimer

We study the galaxy morphology-luminosity-environmental relation and its redshift evolution using a spectroscopic sample of galaxies in the Great Observatories Origins Deep Survey (GOODS). In the redshift range of $0.4\leq z\leq1.0$ we…

Cosmology and Nongalactic Astrophysics · Physics 2009-07-22 Ho Seong Hwang , Changbom Park

The extent to which galaxy structure is shaped by environment beyond the local universe, once stellar mass is controlled, remains an open question in galaxy evolution. We address this challenge using an unprecedentedly large sample of…

We calculate the spatial two-point auto and cross-correlation functions for the 765 galaxies with Rc<21.5 and 0.1<z<0.51 in the ESO-Sculptor survey, and explore the segregation effects among the populations of giant (early-type, late…

Astrophysics · Physics 2009-11-13 Valerie De Lapparent , Eric Slezak

We present the HI content of galaxies in nearby groups and clusters as measured by the 70% complete Arecibo Legacy Fast-ALFA (ALFALFA) survey, including constraints from ALFALFA detection limits. Our sample includes 22 systems at distances…

We provide a physical interpretation and explanation of the morphology-density relation for galaxies, drawing on stellar masses, star formation rates, axis ratios and group halo masses from the Sloan Digital Sky Survey. We first re-cast the…

Cosmology and Nongalactic Astrophysics · Physics 2010-04-28 Arjen van der Wel , Eric F. Bell , Bradford P. Holden , Ramin A. Skibba , Hans-Walter-Rix

We present a scenario for the formation and evolution of disk galaxies within the framework of an inflationary CDM universe, and we compare the results with observations ranking from the present-day up to z~1. Galactic disks are built-up…

Astrophysics · Physics 2007-05-23 C. Firmani , V. Avila-Reese

We study the impact of local density and stellar mass on the morphology of ~500 quiescent (Q) and SFGs from the VIS3COS survey. We perform B/D decomposition of the SBPs and find ~41% of 10^10 Msun galaxies to be best fitted with 2…

We have investigated the properties of a volume and magnitude limited sample of nearby early type galaxies that were carefully selected from the AAO two degree field galaxy redshift survey. We used images from the DSS to confirm the E/S0…

Astrophysics · Physics 2009-11-11 M. Collobert , M. Sarzi , R. L. Davies , H. Kuntschner , Matthew Colless

We use very high-S/N stacked spectra of $\sim$29,000 nearby quiescent early-type galaxies (ETGs) from the Sloan Digital Sky Survey (SDSS) to investigate variations in their star formation histories (SFHs) with environment at fixed position…

Astrophysics of Galaxies · Physics 2015-06-19 Patrick J. Fitzpatrick , Genevieve J. Graves

We examine correlations between the masses, sizes, and star formation histories for a large sample of low-redshift early-type galaxies, using a simple suite of dynamical and stellar populations models. We confirm an anti-correlation between…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 Nicola R. Napolitano , Aaron J. Romanowsky , Crescenzo Tortora

We explore constraints on the joint photometric and morphological evolution of typical low redshift galaxies as they move from the blue cloud through the green valley and onto the red sequence. We select GAMA survey galaxies with…

With the aim to assess the role of dense environments in galaxy interactions, properties we present an analysis of close galaxy pairs in groups and clusters, obtained from the Sloan Digital Sky Survey Data Release 7 (SDSS-DR7). We…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 Sol Alonso , Valeria Mesa , Nelson Padilla , Diego G. Lambas

We exploit the pioneering cosmological hydrodynamical simulation, EAGLE, to study how the connection between halo mass (M_halo), stellar mass (M*) and star-formation rate (SFR) evolves across redshift. Using Principal Component Analysis we…

Astrophysics of Galaxies · Physics 2018-07-11 R. K. Cochrane , P. N Best

Cosmological simulations predict significant secondary dependencies of halo clustering on internal properties and environment. Detecting these subtle signals in observational data remains challenging, with important ramifications for galaxy…

Cosmology and Nongalactic Astrophysics · Physics 2026-02-25 Facundo Rodriguez , Antonio D. Montero-Dorta

We study the evolution of the scaling relations between maximum circular velocity, stellar mass and optical half-light radius of star-forming disk-dominated galaxies in the context of LCDM-based galaxy formation models. Using data from the…

We have improved upon our previous search technique of systematically searching QSO spectra for narrow galactic H-alpha emission, which indicates a foreground galaxy within the Sloan Digital Sky Survey (SDSS) spectral fiber. We now search…

Cosmology and Nongalactic Astrophysics · Physics 2013-10-17 Lorrie Straka , Zakary L. Whichard , Varsha P. Kulkarni , Michael Bishof , David Bowen , Pushpa Khare , Donald G. York

We analyze a volume-limited sample of massive bulge-dominated galaxies with data from both the Sloan Digital Sky Survey and the Galaxy Evolution Explorer (GALEX) satellite. The galaxies have central velocity dispersions greater than 100…

We present a statistical study of the environments of massive galaxies in four redshift bins between z=0.04 and z=1.6, using data from the Sloan Digital Sky Survey (SDSS) and the NEWFIRM Medium Band Survey (NMBS). We measure the projected…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-15 Tomer Tal , Pieter G. van Dokkum , Marijn Franx , Joel Leja , David A. Wake , Katherine E. Whitaker

The Zurich Environmental Study (ZENS) is based on a sample of ~1500 galaxy members of 141 groups in the mass range ~10^12.5-14.5 M_sun within the narrow redshift range 0.05<z<0.0585. ZENS adopts novel approaches, here described, to quantify…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 C. M. Carollo , A. Cibinel , S. J. Lilly , F. Miniati , P. Norberg , J. D. Silverman , J. van Gorkom , E. Cameron , A. Finoguenov , Y. Peng , A. Pipino , C. S. Rudick